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为设计一种针对光网络中单链路失效的波长资源利用率高的快速保护算法,该文分析了完全预配置保护对预配置结构的约束,对比了预配置保护环(p-cycle)和预配置保护通道(p-path)保护性能,提出了p-cycle和p-path混合配置保护方案。该方案按比例选取p-cycle和p-path作为预配置结构,通过求解整数线性规划(ILP)方程得到优化配置方案。使用COST 239网络拓扑进行的仿真实验表明:相同网络负载和波长资源条件下,p-cycle和p-path混合保护方案比p-cycle独立保护方案的网络冗余度可以优化10%,同时保留了p-cycle快速保护的优点。
In order to design a fast protection algorithm with high utilization rate of single wavelength link in an optical network, this paper analyzes the constraints of fully preconfigured protection on the preconfigured structure and compares the preconfiguration of the protection loop (p-cycle) and Preconfigured p-path protection, a p-cycle and p-path hybrid configuration protection scheme is proposed. The scheme chooses p-cycle and p-path as the preconfiguration structure in proportion, and obtains the optimized configuration scheme by solving the integer linear programming (ILP) equation. Simulation experiments using the COST 239 network topology show that the network redundancy of the p-cycle and p-path hybrid protection schemes can be optimized by 10% over the p-cycle independent protection scheme under the same network load and wavelength resources while retaining The advantages of p-cycle fast protection.